A monster, half maid and half serpent. [1913 Webster]
A genus of Monotremata found in Australia, Tasmania, and New Guinea. They are toothless and covered with spines; -- called also porcupine ant-eater, and Australian ant-eater. [1913 Webster]
echidna, n. any of several egg-laying pouch-bearing mammals native to Australia and New Guinea, with a covering of spines, and having a long snout and long claws. Also called spiny anteater.